Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica
Recent GPS observations from a spatially extensive networkacross Ronne Ice Shelf show significant daily ice flowvariations. At all sites, the almost-synchronous horizontaldisplacements occur at diurnal and semidiurnal tidal periods.During spring tides, displacements, velocities and strains nearthe i...
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Online Access: | https://doi.org/10.1029/2012GL051636 http://ecite.utas.edu.au/89656 |
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ftunivtasecite:oai:ecite.utas.edu.au:89656 2023-05-15T13:42:40+02:00 Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica Makinson, K King, MA Nicholls, KW Gudmundsson, GH 2012 https://doi.org/10.1029/2012GL051636 http://ecite.utas.edu.au/89656 en eng Wiley-Blackwell Publishing http://dx.doi.org/10.1029/2012GL051636 Makinson, K and King, MA and Nicholls, KW and Gudmundsson, GH, Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica, Geophysical Research Letters, 39, (10) Article L10501. ISSN 1944-8007 (2012) [Refereed Article] http://ecite.utas.edu.au/89656 Earth Sciences Geophysics Geodesy Refereed Article PeerReviewed 2012 ftunivtasecite https://doi.org/10.1029/2012GL051636 2022-09-05T22:16:43Z Recent GPS observations from a spatially extensive networkacross Ronne Ice Shelf show significant daily ice flowvariations. At all sites, the almost-synchronous horizontaldisplacements occur at diurnal and semidiurnal tidal periods.During spring tides, displacements, velocities and strains nearthe ice front have superimposed oscillations that are +-300%of their mean values and occur over a six-hour period, resultingin regular ice shelf flow reversals. Close to ice streamgrounding lines, however, the horizontal diurnal and semidiurnalsignals decay and almost vanish. From our analysis,we conclude that ice shelves respond primarily elasticallyto tidal tilting, thus accounting for the observed diurnal andsemidiurnal flow variations, and their amplification towardthe ice shelf front. Our findings suggest that detailed modelingof these data could provide improved ice shelf and icestream models for correctly simulating ice shelf flow andpredicting future ice sheet evolution. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf eCite UTAS (University of Tasmania) Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Geophysical Research Letters 39 10 n/a n/a |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geophysics Geodesy |
spellingShingle |
Earth Sciences Geophysics Geodesy Makinson, K King, MA Nicholls, KW Gudmundsson, GH Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
topic_facet |
Earth Sciences Geophysics Geodesy |
description |
Recent GPS observations from a spatially extensive networkacross Ronne Ice Shelf show significant daily ice flowvariations. At all sites, the almost-synchronous horizontaldisplacements occur at diurnal and semidiurnal tidal periods.During spring tides, displacements, velocities and strains nearthe ice front have superimposed oscillations that are +-300%of their mean values and occur over a six-hour period, resultingin regular ice shelf flow reversals. Close to ice streamgrounding lines, however, the horizontal diurnal and semidiurnalsignals decay and almost vanish. From our analysis,we conclude that ice shelves respond primarily elasticallyto tidal tilting, thus accounting for the observed diurnal andsemidiurnal flow variations, and their amplification towardthe ice shelf front. Our findings suggest that detailed modelingof these data could provide improved ice shelf and icestream models for correctly simulating ice shelf flow andpredicting future ice sheet evolution. |
format |
Article in Journal/Newspaper |
author |
Makinson, K King, MA Nicholls, KW Gudmundsson, GH |
author_facet |
Makinson, K King, MA Nicholls, KW Gudmundsson, GH |
author_sort |
Makinson, K |
title |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_short |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_full |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_fullStr |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_full_unstemmed |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_sort |
diurnal and semidiurnal tide-induced lateral movement of ronne ice shelf, antarctica |
publisher |
Wiley-Blackwell Publishing |
publishDate |
2012 |
url |
https://doi.org/10.1029/2012GL051636 http://ecite.utas.edu.au/89656 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Ronne Ice Shelf Tilting |
geographic_facet |
Ronne Ice Shelf Tilting |
genre |
Antarc* Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf |
op_relation |
http://dx.doi.org/10.1029/2012GL051636 Makinson, K and King, MA and Nicholls, KW and Gudmundsson, GH, Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica, Geophysical Research Letters, 39, (10) Article L10501. ISSN 1944-8007 (2012) [Refereed Article] http://ecite.utas.edu.au/89656 |
op_doi |
https://doi.org/10.1029/2012GL051636 |
container_title |
Geophysical Research Letters |
container_volume |
39 |
container_issue |
10 |
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n/a |
op_container_end_page |
n/a |
_version_ |
1766171333497978880 |